Objective To evaluate the sonographic characteristics of peripheral focal inflammation of lung, and to improve the diagnosis and differential diagnosis potency of sonography for pulmonary peripheral lesions. Methods The sonogram of 44 patients with peripheral focal inflammation of lung were retrospectively analyzed and compared with the sonogram of other lesions. Independent variables included lesion’s margin, echotype, the secondary change of visceral pleura, the angulation of lesion’s inner surface and air bronchogram. Lesion’s nature was as dependent variable. The data was analyzed by Logistic regression analysis. Pathological results were confirmed by biopsy. Results The angulation of lesion’s inner surface and air bronchogramwere significant factors affecting the diagnosis of peripheral focal inflammation of lung( P lt;0. 01) . Compared to the pathological yield by biopsy, angulation of lesion’s inner surface being acute angle for diagnosis of peripheral focal inflammation of lung had an accuracy rate of 82. 6% , a sensitivity of 72. 7% , a specificity of 84. 7% , a positive predictive value of 51. 0% , and a negative predictive value of 93. 4%. Conclusions The acute angle of lesion’s inner surface and air bronchogram are sonographic characteristics of peripheral focal inflammation of lung. Bedside lung ultrasound is useful to the diagnosis of peripheral focal inflammation of lung.
Objective To approach the clinical values of computer tomography (CT) examination technique and imaging features in abdominal cavity parenchymal organs injury. Methods One hundred and fifty-nine patients with abdominal cavity parenchymal organs injury were examined by CT of plain scan and (or) contrast enhancement, the enhancement included arterial phase, parenchymal phase and the kidney scanning delay phase, the results of CT scanning were compared. Results Ninty-eight cases among 159 patients were diagnosed as the abdominal cavity parenchymal organs injury by the CT, the diagnosis accordance rate was 98.1% (156/159) by operation and follow-up, 22 cases were simple viscus damage or back bone and pelvic fracture, 39 cases were negative, the examination positive rate was 75.5% (120/159). Conclusion The CT can display the parenchymal organ traumatic condition, subcapsule hematoma, retroperitoneal hematoma, seroperitoneum and injured grade. It is the first selective examination to use CT scanning in abdominal cavity parenchymal organ damage, and it has important clinic values to use correct scanning techniques in abdominal injury examination.
Breast cancer is a malignant tumor with the highest incidence and mortality rate among women worldwide. Early screening and standardized diagnosis and treatment of breast cancer are conducive to improving the survival rate of patients. Breast magnetic resonance imaging (MRI) plays a crucial role in the screening of high-risk populations, diagnosis, staging, and treatment efficacy evaluation. To improve the writing efficiency and diagnostic accuracy of breast MRI reports and promote standardized diagnosis and treatment of breast cancer, there is an urgent need for standardized imaging structured reports. We present the imaging structured report protocol of MRI for breast diseases utilized at West China Hospital of Sichuan university, which aims to promote standardized documentation of breast MRI reports.
Since January 2020, due to the epidemic of coronavirus disease 2019, all universities in China have postponed their studies or even suspend their studies. In response to the teaching policy of “suspending class, but keeping teaching and learning” , college teachers have rapidly changed into online teaching mode. However, how to ensure the quality and effect of online teaching still needs further exploration. Through analyzing the course characteristics of medical imaging diagnostics and students’ learning situations, this study discusses how to design detailed online teaching projects and improve the teaching quality and how to select online software suitable for the course. A questionnaire survey was conducted to evaluate the effect of online teaching during the spring course in 2020, selecting a total of 297 clinical and other undergraduate students of grade 2017 from West China School of Medicine of Sichuan University. The results showed that the detailed online teaching programs including “video learning” “distance teaching” “periodic examination” “weakness tutorial” were helpful to the learning process agreed by the majority of students. During the epidemic period, online teaching method can help students master the content of medical imaging diagnosis. In the era of Internet, the “online+offline” teaching mode is expected to be popularized in the future.
Objective To analyze the status of applying diagnostic test in imaging scientific study internationally and domestically, and to compare the application of the image diagnostic studies of our country with that of abroad. Method We hand-searched the diagnosis tests published in the "Chinese Journal of Radiology", the most influential in China, and in "Radiology’’, the most influential abroad, from 1998 to 1999 respectively. Then we evaluated each of the diagnosis tests according to the international standards. Results We searched 408 original articles in "Chinese Journal of Radiology" in which the diagnostic test articles were 12%, and 796 original articles in "Radiology" with the diagnostic test articles 23% from 1998 to 1999 respectively. In these diagnosis tests, by comparing the "Chinese journal of radiology" with the "Radiology", it was found that 19% applied blind comparison with Gold Standard, 28% calculated sensitivity, specificity and accuracy, 9% both calculated negative predictive value and positive predictive value and none calculated likelihood ratios in the former versus 64%, 57%, 33% and 26% and 3% respectivdy in the latter. Conclusions Compared with the international level, both the quality and the quantity of the diagnosis tests applied in the specialty of imaging scientific study in China are much lower and far from meeting the clinical requirement. Improving the methods of scientific study and carrying on more diagnosis tests with high qualities are of important significance in improving the diagnostic level of imaging.
Mitral stenosis includes mitral stenosis due to rheumatic fever and non-rheumatic valve stenosis characterized by degenerative changes. Rheumatic mitral stenosis is common in developing countries and occurs in young adults, while degenerative mitral stenosis is common in developed countries and increases in incidence with aging. Mitral stenosis of different etiologies can lead to changes in heart structure and function, which affects the quality of life and prognosis of patients, so lifelong management of mitral stenosis is crucial. This article provides a comprehensive reference for clinicians in the management of mitral stenosis, with a detailed overview of the emerging prevalence features, imaging diagnosis, and treatment methods.
ObjectiveTo investigate the citation status of systematic reviews on imaging diagnosis in clinical practice guidelines (CPGs) and provide reference for the development of Chinese imaging diagnosis guidelines. MethodsWe electronically searched PubMed databases to collect systematic reviews on imaging diagnosis. The date was limited from January 1st 2010 to December 31th 2012. Two reviewers independently screened literature and extracted data. The citation data of included systematic reviews were obtained on the Web of Science. Citation analysis method was used to analyze the citation frequency of systematic reviews on imaging diagnosis in CPGs. Results292 systematic reviews on imaging diagnosis were included, of which 94% (275/292) were indexed by Science Citation Index. The total citation frequency of these systematic reviews was 5413 (medium:20, range:0 to 131). 28% (78/275) were cited by CPGs. Of which, 7% (19/275) were used as the source of the evidence of recommendations in CPGs. ConclusionThe ratio of systematic reviews cited by CPGs is low, the ratio of being the source of evidence of recommendations of systematic reviews in CPGs is lower, and furthermore, the citation is time-delayed.
ObjectiveTo summarize the advantages of double-layer detector spectral CT (DLCT) as compared with conventional CT in disease diagnosis and its research status in the diagnosis of gastric cancer. MethodThe literature relevant research was summarized, including the clinical application of DLCT and its clinical research in the diagnosis of gastric cancer. ResultsThe image quality of DLCT was better than that of conventional CT examination. Its virtual non-contrast could display gastric cancer lesions and evaluate lymph node metastasis. The number of CT scans of patient was reduced by DLCT, correspondingly the radiation dose received by patients was reduced, and the examination time of patient was shortened. The iodine uptake in the tissues could visually be observed by the iodine concentration map in the DLCT and be quantitatively analyzed, which could provide a new option for noninvasive evaluation of angiogenesis in the gastric cancer. The DLCT scanning provided a material decomposition image, the different iodine absorption of normal gastric mucosa and gastric cancer could be reflected by the material decomposition image. The enhancement degree and blood supply of lesions could be effectively reflected by quantitative measurement of iodine concentration and thus the benign and malignant changes of the gastric diseases were effectively identified. The DLCT could distinguish the structure of the gastric wall, which could show the depth of invasion of malignant gastric lesions to the gastric wall and whether the adjacent tissues and organs were involved or not. Through the homology analysis of abnormal lymph nodes and suspicious metastases in the abdominal cavity through the related parameters of the DLCT could more accurately determine the clinical TNM stage of the gastric cancer before surgery. ConclusionsIn recent years, DLCT has shown a better morphological diagnostic efficiency than conventional CT in clinical application. Its virtual non-contrast, iodine concentration, effective atomic number, and other parameters characteristics make it show obvious advantages in gastric cancer, such as evaluation of angiogenesis of gastric cancer, differentiation of benign and malignant gastric diseases, clinical staging of gastric cancer, and other applications. In future, with more usable parameters research and continuous accumulation of clinical application about DLCT in clinic, which can better serve clinical work.